Recreations & Games

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What If?, #1 Sep 2014 What If?: Serious Scientific Answers to Absurd Hypothetical Questions Adult, Applied Sciences, Astrophysics Adult, Applied Sciences, Astrophysics 54.4303 pages 303 5
Oct 2012 Paradox: The Nine Greatest Enigmas in Physics Games & Activities, Logic & Brain Teasers, Mathematics Games & Activities, Logic & Brain Teasers, Mathematics 14.0256 pages 256 1